Cone-shape ensures uniform extraction for pure coffee flavor Thicker (20-30% more than the competition) specialty fiber filter design keep bitter elements, oils, and grounds in their place (and out of your cup) Prefolded for convenience Will fit most other cone-shaped filter coffeemakers Removes impurities, acidity, unhealthy and bitter elements from the coffee. In your brewed cup you will find only the caffeine and desirable aromatic oils of the coffee beans Works well with all types of roasts- even tea! Allowing you to make the perfect and most pure cup, every time The CHEMEX coffeemaker brewing system is a preferred method of roasters and baristas worldwide Our filter paper is manufactured in the USA and uses only USA materials. Responsibly harvested and conforming to SFI, FSC, and PEFC sustainable programs Compostable and biodegradable Easy clean-up. No trays, no baskets, just simply remove the filter and discard Fits all CHEMEX Coffeemakers except CM-1, CM-1C, CM-1GH, CM-FNX